Ejecting mechanism for die presses



W. H. NEEDHAM.

EJECTING MECHANISM FOR DIE PRESSES.

APPLICATION FILED APR-13,1918.

Patented Feb. 7, 1922.-

2 SHEETS-SHEET 1.

W. H. NEEDHAIVI.

EJECTING MECHANISM FOR DI E PRESSES- APPLICATION FILED APR 13, 1918.

Patented Feb. 7, 1922 2 SHEETS-SHEET 2.

y punch.

UNITED STATES FATE? winner: H. NEEDHAM, or wo cns'rnR, MASSACHUSETTS, 'assIGNoR 'ro BOSTON PRESSED METAL 00., or WORCESTER, MASSACHUSETTS, a CGRI'ORATION or MAINE.

portance when automatic feeding mechanism is also provided. a

It is the general object of my invention to provide an automatic ejecting mechanism for die-presses, operable to en 'a 'e the finished article as the punch is withdr wn therefrom, and to remove it from the press. In the preferred form this mechanism includes an ejecting member operable in timed relation to the movement of the press plunger and 7 An important feature of my invention relates to improved operating connections between the plunger and the ejecting member, whereby said member is suddenly and positively moved to eject the finished article when the plunger reaches a predetermined point in its upward travel.' Special advantages reside in the specific construction and mode of operation of the actuating member,

' which is mounted to move with the plunger.

Further features of my invention relate to' arrangements and combinations of parts hereinafter described and more particularly pointed out in the appended claims.

A preferred form of my invention is shown in the drawings, in which- Fig. 1 is a front elevation ofa portion of a press, with my improved ejecting mechanism mounted thereon;

Fig. 2 is a side elevation of the parts shown in Fig. 1;

Fig. 3 is a plan view taken along the lines 3-3 in Fig. 1; v

Figs. 4 and 5 are detail views of the actuating member which is mounted on the plunger;

Fig. 6 is a detail plan view,-showing the cam roll with which said member cooperates,

Specification of Letters Patent. 7

EJECTING MECHANISM FOR DIE rREssRs. V

Patented Feb. 7, 1922. Application filed Apr-il 13, 1918. Serial No. 228,442.

taken in the direction of the arrow 6' in Fig.1; I r

F ig.'7 is a sectional plan view taken along the line 7-7 Fig. 2," and'showing the spring for returning the ejector to: initial position, and

' Figs; Sand 9' are; diagrammatic views illustrating the operation of the mechanism.

Referring to the drawings, I have shown a portion of a press frame 10, in which is slidably mounted a plunger 11, to which is secured a punch 12 of any desired-form.

The press may be. provided witha bed 13 *to which is secured a die "block 14, on which is mounted a stripper plate 15. a

= Myejecting mechanism is "particularly useful when employed in a press-for making cup-shaped bushings or ferrules of thegen eral type illustrated at 16 in Figs. 8 and 9. After the punching operation the article 16 adheres closely to thepunch, and is raised thereby until separated therefrom by engagement with the stripper plate I My 'mproved ejecting mechanism'include an e ectmg arm 17 secured in a casting 18 which is adjustably fixed to the lower end of a vertical shaft 19, rotatable inbearings 20 and21 rigidly secured to the frame 10. The upper end of the shaft 19 is provided with a head'22 to'wh'ich is secured a rotatable cam roll 23, (Fig. 6). Acollar 27 is secured to the shaft 19Qabove the bearing 20, this collar-being provided with a'lug 28' (Fig. 7 positioned for engagement by a springpressed plunger 29. .A spring 30 is provided within the plunger 29, the projecting end of the spring'abutting against a fixed plate 31. A secondlug 32 onthe collar 27 is provided with a stop-pin 33 (Fig. 1), which engages the bearing 20 and determines the normal position of theejector.

A slotted plate 34 (Fig. 2.) is adjustably connected to the plunger 11 by a bolt 35 and supports an actuating member or block 36 (Figs. 4 and 5). The member36 is'slidable in a downwardly inclined guideway 37 in the upper end of the plate 34. The underside .of the member 36 is'grooved at 38 to receive a stop pin 39 which limits the downward movement of the member 36. Such movement is produced by aspring 40 held in position by a plate 41, which is removably secured to the upper end of the plate 3 (in. its lower side the gnideway is cut away to provide shoulder 42, positioned to cooperate with a lug on the underside of the member 3 Having described the details or construction of my invention, 1 will now describe its method of operation. he completed article 16 is withdrawn from the punch by engagement with the stripper plate 15. As the parts assume the position shown in Fig. 9 the cam roll 23 is engaged by the projec ing end of the actuating member 36, and is abruptly moved to swing the ejecting member 17 in the direction of the arrow. a in Fig. 3. The article 16 is thus struck a sudden blow by which it is removed from the press, and may be deposited in any suitable receptacle.

As soon as the member-36 has passed the roll 23, the ejecting member 17 is returned to its initial position by the spring 30. hen the actuating member 36 engages the roll23 as above described, during the upward movement of said member, the lug 43 is forced downwards against the shoulder 42, thus preventing movement of the member 36 out of operation. Then, however, the plunger descends so that the member 36 engages the roll 23 on the under side of the projecting portion of the member 86, the lug as is lifted ofif of t e shoulder Q'and the roll forces the actuating member upwardly into its recess, thus permitting the roll to pass by without movement of the roll from normal position, such movement being prevented by the stop pin The exact moment of actuation of this ejector maybe controlled by adjusting the plate 3e upward or downward upon the plunger 11, and the initial position of the ejector 17 may also be adjusted by varying the position of the casting 18 on the lower end of the shaft 19. I It will thus appearthat I have provided simple and positively operated mechanism for ejecting finished articles from a punch or die press, and that I have also provided adjustments by which the ejecting mechanism may be readily adapted to the particular work passing through the press.

It will be further evident that changes and modifications can be made in invention, without departing from the spirit and 'scope thereof as set forthin the claims, and

i do not wish to be otherwise limited to the details herein discloserh'but what I claim is:

1. An ejecting mechanism for presses l1aving a punch and a stripper, compi sing an ector, a vertical shaft to'which said ejector is fixed, an'ai'ai ii'xed to said shaft, an actuator movable with said punch" and effectivelyengaging said actuating arm to give said ejector an abrupt positive operative movement on upward movement-oi said punch only, and means separate from said punch effective to restore said ejector, shaft and arm to normal position. 1

2. An ejecting mechanism for presses having a punch and a stri aper, comprising an ejector, shaft on which said ejector is mounted, a cam roll secured tosaid shaft, an actuator for said cam roll, movable with said punch, said actuator beingyieldingly TflOViLblQ to inoperative position when moving in one direction, and being positively held in operative position when moving in the opposite direction.

Anejecting mechanism for presses having a punch anda stripper, comprising an ejector, an arm connected to said ejector,

and an actuator for said arm movable with the punch, said actuator comprising a part fixed relatively to said punchand having a socket therein, and amember slidable' in said socket and yieldingly pressed downwards in an inclined direction toward said arn. y

4;. An ejecting mechanism for presses having a punch and a stripper, comprising-an ejector, an arm connected to said ejector and an actuator forsaid arm'movable with the punch, said actuatorcomprising a part fixed re =.tivelytosaid punch and having a socket therein, and a member slidable' in said socket and yieldingly pressed downwards in inclined direction towardsaid arim said member and SOCkGtlltlVlHg cooperating shoulders effective to prevent relative movement of said member 111 its socket when engaged by said arm during-upward 'movement of said member, butpermitting such relative movement when said member is moving in the opposite direction;

In testimony whereol llhave hereunto affixed my signature. I

winnmiifn. NEEDHAM; 

